Why does(n't) it work?

The problem

I upgraded my test system from FreeBSD 14.3 to FreeBSD 15.0 without much issues, so I thought do also upgrade my production system. But after rebooting the system, it didn’t get back up and when I looked at the console I saw the following messages on the screen:

hdac0: Unexpected unsolicited response from address 1: 00000000
hdac0: Unexpected unsolicited response from address 1: 00000000
hdac0: Unexpected unsolicited response from address 1: 00000000
hdac0: Unexpected unsolicited response from address 1: 00000000
hdac0: Unexpected unsolicited response from address 1: 00000000
hdac0: Unexpected unsolicited response from address 1: 00000000
hdac0: Unexpected unsolicited response from address 1: 00000000
hdac0: Unexpected unsolicited response from address 1: 00000000
hdac0: Unexpected unsolicited response from address 1: 00000000
hdac0: Unexpected unsolicited response from address 1: 00000000
hdac0: Unexpected unsolicited response from address 1: 00000000

And those messages just kept coming.

This post is based on https://kaworu.ch/blog/2016/04/20/strong-crypt-scheme-with-dovecot-postfixadmin-and-roundcube/ with adjustments for my situation and updated links to the documentation. I use PostfixAdmin 3.3.15, Roundcube 1.6.11 and Dovecot Community Edition (CE) 2.4.1 .

When I was migrating from Debian bookworm to trixie, I noticed that Dovecot was upgraded to version 2.4.1 and because I had to enable the deprecated auth_allow_weak_schemes option, I thought it would be a good idea to look at how to improve the security of the passwords that are stored for my email setup. On the documentation site for Dovecot CE there is a nice page on Converting Password Schemes which pointed to the site where is post is based on.

Originally I choose to use the MD5-CRYPT scheme, because it was the most universal supported scheme which was not plain text. Now it is time to move to something more secure.

This post is based on https://jacksonchen666.com/posts/2022-12-03/14-33-00/ .

When running synapse as a matrix server it will eventually take a lot of disk space, especially when it is a federated server where local users have joined a lot or busy rooms.

This blog post is based on http://evolvisforge.blog.tarent.de/archives/124 .

Mozilla Firefox has a tentancy to create a ~/Desktop directory among others (things like ~/Downloads). If you want to prevent this, you can use the following commands:

mkdir -p -m0700 ~/.config
cat >~/.config/user-dirs.dirs <<EOF
XDG_DESKTOP_DIR="$HOME/"
XDG_DOCUMENTS_DIR="$HOME/"
XDG_DOWNLOAD_DIR="$HOME/"
XDG_MUSIC_DIR="$HOME/"
XDG_PICTURES_DIR="$HOME/"
XDG_PUBLICSHARE_DIR="$HOME/"
XDG_TEMPLATES_DIR="$HOME/"
XDG_VIDEOS_DIR="$HOME/"
EOF

Upon next start, Firefox (and other XDG-compliant applications) will throw stuff into ~/ instead.

Why add subject to postfix logging

If you are running your own email server, you might have gotten a question if an email has been handled correctly. And since users mostly only remember the subject of the message, it is useful to have that in the logging of postfix, so you can search for that.